Powershell monitor multiple directories

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暗喜
暗喜 2021-01-15 20:12

Note: Running PowerShell v3

I\'ve got a directory setup that is currently:

\\ftproot\\001\\converted
\\ftproot\\001\\inbound
\\ftproot\\001\\pdf

\\f         


        
1条回答
  •  囚心锁ツ
    2021-01-15 21:09

    Is it possible to create an array or list or similar of IO.FileSystemWatcher?

    Yes. Making use of a pipeline would be something like:

    $fsws = $directoriesOfInterest | ? { Test-Path -Path $_ } | % {
              new-object IO.FileSystemWatcher …
            }
    

    and $fsws will be an array, if there is more than one watcher created (it will be a waster if there is only one, $null if there are none). To always get an array put the pipeline in @(…):

    $fsws = @($directoriesOfInterest | ? { Test-Path -Path $_ } | % {
              new-object IO.FileSystemWatcher …
            })
    

    if so, how can I code the Register-ObjectEvent for each instance?

    Put the object registration in the same loop, and return both the watcher and the event registration:

    $result = @($directoriesOfInterest | ? { Test-Path -Path $_ } | % {
                # $_ may have a different value in code in inner pipelines, so give it a
                # different name.
                $dir = $_;
                $fsw = new-object IO.FileSystemWatcher $dir, …;
                $oc =  Register-ObjectEvent $fsw Created …;
                new-object PSObject -props @{ Watcher = $fsw; OnCreated = $oc };
              })
    

    and $result will be an array of objects will those two properties.

    Note the -Action code passed to Register-ObjectEvent can reference $fsw and $dir and thus know which watcher has fired its event.

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